Dc Motor Speed Controller Circuit

It is basically a pwm pulse width modulated motor driver that incorporates two separate stages for the generation of the pulses.

Dc motor speed controller circuit.

It senses the increase in the motor current when the rotation of the motor slows down due to a load. Dc motor speed controller circuit. Many dc motor speed control circuits have been published here but this is the first one using ne555 timer ic. Dc motor may be a purely inductive load so if you would like to regulate the speed of the dc motor then we ve to upper lower the voltage for higher lower speeds.

An external variable dc voltage source is effectively translated into a varying pwm signal. And the way the pwm signal is employed to regulate the dc motor speed. Mainly we are getting to find out how the circuit works and what s about the pwm signal. When the wiper arm of potmeter vr1 is in top position capacitor c1 charges through r1 r2 and d1 and produces a pulse train at the output of ic1 with long negative and short positive pulse widths.

A circuit which enables a user to linearly control the speed of a connected motor by rotating an attached potentiometer is called a motor speed controller circuit. Therefore the motor speed is slow. The proposed circuit can be considered almost a perfect dc motor speed controller. 3 easy to build speed controller circuits for dc motors are presented here one using mosfet irf540 second using ic 555 and the third concept with ic 556 featuring torque processing.

A simple dc motor controller circuit using ne555 is shown here. But in practically higher voltage and lower voltage isn t that sort of possible so during this case we use another sort of method which is named pwm better. A pwm circuit based on timer ne555 is the heart of this circuit. On the other hand when the wiper arm of vr1 is at the bottom position c1 charges through r1 r2 and vr1 and discharges via r2.

In addition to controlling the motors speed its direction of rotation can be also changed using this circuit. P1 potentiometer varies the speed of the motor.